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A
B
TUNER UNIT
(X11-3822-71) (C/7)
1
CAUTION: For continued safety, replace safety critical
components only with manufacturer's recommended parts
(refer to parts list).
indicates safety critical components.
For continued protection against risk of fire, replace only
with same type and rating fuse(s). To reduce the risk of
electric shock, leakage-current or resistance measure-
ments shall be carried out (exposed parts are acceptably
insulated from the supply circuit) before the appliance is
returned to the customer.
2
A601 (W02-2584-05)
J601
C1
C2
C4
1
1
27P
15P
0-5P
FM 75
3
ANT1
L2
2
2
GND
D1
3
3
GND
GND
AM
4
4
GND
FET1
: 2SK302
TR1
: 2SC2714
E601
TR2,3
: 2SC2413
D1-4
: SVC220 or
KV1440
4
R688 56K
R693
10
R651
5.6K
+
+
5
2.5V
(2.5V)
REFERENCE
DIVIDER
2
C B I/F
6
X601
7.2MHz
C644
470P
The DC voltage is an actual reading measured with a high impedance type voltmeter as the AM/FM signal generator is
specified to the conditions as shown in the list below. The measurement value may vary depending on the measuring
7
instruments used or on the product. The value shown in ( ) is actual reading measured in the AM mode.
C
D
R690
680
D601
AM RF
L601
L602
1uH
FM FRONT END
MIX
DISTORTION(ST)
TR1
RF AMP
R4
C9
0-100
5P
C6
FET1
10P
R5
100
TR2
C19
OSC
8P
+B
+
PLL
1.0V
(1.0V)
IC602
1/2
PHASE DETECTOR
CHARGE PUMP
12bits PROGRAMABLE
SWALLOW COUNTER
1/16,1/17 4bits
DIVIDER
POWER
UNLOCK
ON
DETECTOR
RESET
DATA SHIFT REGISTER LATCH
UNIVERSAL COUNTER
10.1V (10.3V)
0V (11.6V)
E
F
CN12
2
1
FM
TUNED
C640 2P
ADJ
L609
10uH
R642
R641 100K
10K
REG
AM
AM
ALC
OSC
MIX
RF.AMP
BUFF
SD
COMP
+
R643
VT
5
220
FM
AM/FM
IFT
S-CURVE
IF-OUT
7
S-METER
IF-BUFF
FM
FM IF
DET
R11
0-100
VCC
6
C23
OSC
8
100P
L603
TR3
OSC
BUFFER
+
C676
47P
FM AMP
C605
0.01
6.3V
6.9V
Q602
1.7V
1.6V
C601
0.022
C684
Q601
0.022
1.1V
CF602
CF601
R644
+
270
+B
1/4W
R648 1K
6
R647 3.3K
5
R646 3.3K
4
R645 3.3K
3
G
H
C627
C625
180P
10u25
C624
R625
C626
+
+
220P
18K
0.022
+
FM, MPX
AM SYSTEM
+
IC601
2.9V
(2.9V)
DECODER
ANTI-BIRDIE
AM
P-DET
STEREO
SW
AGC
MUTE
AM IF
DET
FF
VCO
FF
304KHz
38K
19K
2
AM
S-METER
TUNING
STEREO
DRIVE
DRIVE
4.3V
(0V)
GND
VCC
8.0V
(8.0V)
C681
1
+
+
+B
L604 (GRN)
L605 (WHT)
+
+B
R611
22
FM DET MPX
R694
10
+B
R687
1M
+B
+B
FM:11.3V
Q614
AM:0V
FM +B
10.7V
MODULATION
MODE
CARRIER
FREQUENCY
DEVIATION
FM
98MHz
1kHz
STEREO 67.5kHz 7.5kHz(Pilot)
AM
1000(999)kHz
400Hz
MONO 30% MOD
I
J
+
D6
C637
R633
10u10
1K
+
4.3V
C638
(4.3V)
10u10
+
2
FF
PILOT
19K
8
DET
R344
470K
1
3
6.9V
3.5V
(3.6V)
Q607
15.0V
R635
100
8.0V
R638
Q606
2.9V
1K
3.7V
4.3V
+
C617
+
1u50
15.0V
R681
150
+15V
1W
+B
11.5V
R659
1.2K
C686
470P
ANT INPUT
60dB
60dB
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